Juniper Juniper Certifications JN0-648 Questions & Answers

• Question 51:

  When configuring 802.1X authentication, what are three server fail fallback settings? (Choose three.)

  A. log

  B. sustain

  C. permit

  D. count

  E. move

  Correct Answer: BCE

• Question 52:

  Which protocol is a multicast routing protocol?

  A. OSPF

  B. BGP

  C. PIM

  D. IS-IS

  Correct Answer: C

• Question 53:

  A BA classifier, input policer, and a multifield classifier are applied to an interface. In which order are these features processed?

  A. policer –andgt; BA classifier –andgt; multifield classifier

  B. policer –andgt; multifield classifier –andgt; BA classifier

  C. multifield classifier –andgt; BA classifier –andgt; policer

  D. BA classifier –andgt; multifield classifier –andgt; policer

  Correct Answer: A

• Question 54:

  You are deploying PIM source-specific multicast (SSM) for a new multicast messaging service. You have configured the multicast source to use 235.44.123.100 as the multicast address. You are not able to join the PIM SSM multicast feed.

  Which two solutions would resolve this problem? (Choose two.)

  A. Reconfigure the multicast source to use an address in the range of 224.0.0.0 through 224.255.255.255.

  B. Reconfigure the multicast source to use an address in the range of 232.0.0.0 through 232.255.255.255.

  C. Add the multicast address to the [edit routing-options multicast ssm-map]stanza.

  D. Add the multicast address to the [edit routing-options multicast ssm-groups]stanza.

  Correct Answer: BD

• Question 55:

  Click the Exhibit button.

  

  Referring to the exhibit, a PIM-SM network is set up to enable communication between multicast devices. Which statement is true in this scenario?

  A. After the formation of the shortest-path tree, a prune message is sent from R1 to R5.

  B. After the formation of the shortest-path tree, a prune message is sent from R1 to R2.

  C. After the formation of the shortest-path tree, a join message is sent from R5 to R1.

  D. After the formation of the shortest-path tree, a join message is sent from R1 to R5.

  Correct Answer: B

• Question 56:

  Which type of BGP is used to peer with a different autonomous system?

  A. external

  B. classless

  C. dynamic

  D. static

  Correct Answer: A

• Question 57:

  Which statement is correct about MSTP?

  A. MSTP enables mapping multiple independent spanning-tree instances onto one physical topology.

  B. MSTP enables dynamic discovery of Layer 2 neighbors.

  C. MSTP dynamically manages VLAN registration in a LAN.

  D. MSTP uses stacked VLAN tags to extend a Layer 2 Ethernet connection between multiple sites.

  Correct Answer: A

• Question 58:

  Which protocol is used for port-level access control and authentication?

  A. MD5

  B. IPsec

  C. 802.1X

  D. AES

  Correct Answer: C

• Question 59:

  Your company has expanded into office space across the street. The new office space has a single Ethernet connection connected to an unmanaged switch. You must sort traffic based on the IP address into different VLANs once the traffic arrives on your EX Series switches.

  Which mechanism would you use to accomplish this task?

  A. MVRP

  B. filter-based VLANs

  C. Q-in-Q tunneling

  D. dynamic VLANs

  Correct Answer: B

• Question 60:

  You are implementing 802.1X authentication in your Layer 2 network. Each user will have a computer and a phone and you must ensure that both devices are authenticated individually.

  In this scenario, which supplicant mode should be used?

  A. captive-portal

  B. single

  C. multiple

  D. single-secure

  Correct Answer: B